.wrap-checkbox {
    background: url("images/sprite.png") no-repeat scroll -62px -244px transparent;
    display: block;
    float: left;
    height: 26px;
    margin-right: 2px;
    width: 21px;
}
.wrap-checkbox.active {
  background: url("images/sprite.png") no-repeat scroll -42px -244px transparent; 
  /* изменяем background-position при активном чекбоксе */
}

label {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
}


.cat-checkbox-item{
    width: 150px;
    height: 40px;
    float: left;
}

fieldset#cat-fieldset {
    -webkit-border-radius: 15px;
    -moz-border-radius: 15px;
    border-radius: 15px;
    padding: 5px;
}
fieldset#cat-fieldset legend{
    margin-left: 15px;
}

span.ss {
    background-color: green;
}